Vulnerability · Published Apr 23, 2026 · Assigned by GitHub_M
CVE-2026-41267Flowise: Improper Mass Assignment in Account Registration Enables Unauthorized Organization Association
High 8.1
In plain English
A high-severity authorization bypass via user-controlled key in Flowise from FlowiseAI. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, an improper mass assignment (JSON injection) vulnerability in the account registration endpoint of Flowise Cloud allows unauthenticated attackers to inject server-managed fields and nested objects during account creation. This enables client-controlled manipulation of ownership metadata, timestamps, organization association, and role mappings, breaking trust boundaries in a multi-tenant environment. This vulnerability is fixed in 3.1.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | flowise | 3.1.0 | GHSA-48m6-ch88-55mj |
Affected products (as reported)
Weakness: CWE-639, CWE-915 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/FlowiseAI/Flowise/security/advisories/GHSA-48m6-ch88-55mj x_refsource_CONFIRM